| Company Name | Type | Status |
|---|---|---|
| OLIGO LIMITED | Private company limited by shares | Dissolved |
| OLIGO ASIA ENVIRONMENTAL GROUP LIMITED | Private company limited by shares | Live |
| OLIGO ASIA INFRASTRUCTURE GROUP LIMITED | Private company limited by shares | Live |
| OLIGO PARTNERS LIMITED | Private company limited by shares | Live |
| OLIGOCLASE LIMITED | Live | |
| OLIGOLD COMPANY LIMITED | Private company limited by shares | Dissolved |
| OLIGOLD HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| OLIGOSENSITIVE LIMITED | Private company limited by shares | Live |